how to config Wireguard for pve host?

I want to establish an vpn tunnel as site to side connection between two distant pve nodes (pve 1/ pve 2).
pve 1 is on a vps with one public IP
pve2 is behind a fritzbox.

My Setting:

I installed Wireguard-server in a LXC-wireguard on pve 1 and pve 2.
The connection between is LXC-wireguard-pve1 and LXC-wireguard-pve2 is established and from LXC-wireguard-pve1 I can ping all LXC of pve 2.
I configured a route for pve2 in the fritzbox.

Problem:
How can I configure the routing on pve1 that...

Read more